The catalytically inactive tyrosine phosphatase HD-PTP/PTPN23 is a novel regulator of SMN complex localization

Alma Husedzinovic,B. Neumann,Jürgen Reymann,Stefanie Draeger-Meurer,A. Chari,H. Erfle,U. Fischer,O. Gruss

Published 2015 in Molecular Biology of the Cell

ABSTRACT

This first systematic and comprehensive screen of human phosphatases for a regulatory role in the survival motor neuron (SMN) complex identifies the catalytically inactive, non–receptor-type tyrosine phosphatase PTPN23/HD-PTP as a novel SMN complex regulator. PTPN23 maintains a highly phosphorylated state of SMN, which is important for its function in snRNP assembly.

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